simple calculator circui

Shortened vertical antenna for 7 Mhz - A simple drawing of a shortened antenna for 40 meters by using a PVC tube

40M Inverted Vee - This simple antenna can be used in various configurations for 40/80/20 or any WARC band or a combination of them

Antenna Trap Calculator - Design your own antenna trap online

Coil calculator - On-line single-layer coil designer

Antenna wire catenary calculator - This is a simple calculator for solving the antenna wire catenary between to end points given the design wind speed, mass per unit length of the wire, wire diameter and Gross Breaking Strength of the wire.

QRP Balun - Pictures and assembling instructions of a simple qrp balun

Simple HF Baluns for 50/75 ohm coax - Show diagrams, winding methods and tables of some 1:1 and 4:1 baluns for 1.8 - 30 MHz suitable for use up to 200W (400W peak) on systems using 50 or 75 ohm coaxial cable input where SWR should not exceed 1.6:1.

A simple EH antenna - Simple EH antenna project for EH antennas from 20 to 10 meters band by F5IXU in french

Easy tuning an building of traps  ^updated - A new and simple method for tuning traps. You need 2-3Watt of your TRX and two homemade coupling coils by DK7ZB

Offset multiband trapless antenna - Simple, easy to build, low cost, compact, multiband By Robert Wilson, AL7KK

Simple VHF Gamma Match - Plan of a simple VHF & UHF Gamma match contrstruction

10 m Aerial Matching Unit - This simple matching unit will allow a 10 meters aerial to be used right across the 10m band without the need to physically adjust the elements, and offers a virtual 1:1 VSWR at 50 ohms impedance to the transmitter.

Single Coil Z Match - The simple Z match tuner simplified, article by Lloyd Butler VK5BR

NM-ARTS - Amateur Radio Technical Society - A hardware and software project group to support learning and creation radio circuits, general electronics, and uProcessor control systems

Radio QTH practice exams - Call sign lookup system based on FCC database allow lookup for vanity call signs, practice exams and simple online qsl card creation

Packet Radio on a Windows CE device made simple - How to use packet radio using the WindowsCE operating system

Shortwave Converter - This is a simple circuit that when placed near an ordinary AM broadcast radio will allow you to receive international shortwave broadcasts in the 5-6 MHz band

Beacon Light - A simple beacon monitoring program for windows by DL5SWB

MiniErrorCorrection Program - This simple program was written as a possible utility for those attempting to communicate using digital modes via paths that are intermittent and tenuous such as Aircraft Scatter at VHF and Low Earth Orbiting Satellites by G3PPT.

W2IOL GCGC Distance/Bearing - Freeware dos and linux command line executables to calculate grid great circle/geodesic distance, azimuth/bearing and MUF calculator by W2IOL

LinRepeat Priority listing - LinRepeat is free repeater control software for Ham Radio that runs on Linux. It is easily configured and modifiable, and is licensed under the GNU Public License version 3 (GPLv3). It's intended to be as simple, fast, and stable as possible. It relies on other software such as Gstreamer although the program itself is written entirely in Perl.

A simplified video control box - When one starts in amateur television, one begins with a small simple transmitter and a small camera. But very quickly, one needs to transmit audio signals with the pictures, then comes a second camera

mini dB Calculator - dB-Calculation for the experimenting radio amateur.

A simple SWR Meter - This article describes a simple QRP SWR meter built using readily available parts.

Fun With Tubes - Dedicated to passing on and preserving knowledge of vacuum tube circuits and techniques